How did 1990's 2.5D games work?

[lucasw]

Id/Apogee engines, Silverman/Build engine, how-to programming book engines.

[lucasw]

Wolfenstein 3D

This is very similar to current lucaswlabyrinth.cpp but without fisheye: http://lodev.org/cgtutor/raycasting.html

Suggests storing textures rotated 90 so that cpu can access vertical stripes more efficiently.

What about storing the entire buffer rotated because it is also being drawn on in columns, then rotated it before putting it on the screen?

[lucasw]

Doom

http://fabiensanglard.net/doomIphone/doomClassicRenderer.php

[lucasw]

Build

Duke source code